The effect of K, Cs and O atoms on ethylene adsorption on the Pt(111) surface

The adsorption of C2H4 on bare and Cs-, K-, O-precovered Pt(111) surfaces has been investigated, using UPS and TDS. All coadsorbates induce the appearance of more loosely (π-bonded) adsorbed species. In the presence of alkali adatoms, these new species are almost undistorted compared to gaseous, mul...

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Bibliographic Details
Published inSurface science Vol. 237; no. 1-3; pp. 63 - 71
Main Authors Cassuto, A., Mane, Mane, Hugenschmidt, M., Dolle, P., Jupille, J.
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.11.1990
Amsterdam Elsevier Science
New York, NY
Subjects
Applied sciences
Chemistry
Exact sciences and technology
General and physical chemistry
Metals. Metallurgy
Solid-gas interface
Surface physical chemistry
Molecular orbital
Monolayer
Oxygen
Hydrocarbon
Thermodesorption
Cesium
Crystal face
Transition metal
Thermal desorption
Experimental study
Organic adsorbent
Gas solid adsorption
Ultraviolet radiation
Platinum
Gas solid interface
Metallic adsorbent
Photoelectron spectrometry
Potassium
Modified material
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Summary:The adsorption of C2H4 on bare and Cs-, K-, O-precovered Pt(111) surfaces has been investigated, using UPS and TDS. All coadsorbates induce the appearance of more loosely (π-bonded) adsorbed species. In the presence of alkali adatoms, these new species are almost undistorted compared to gaseous, multilayered ethylene and ethylene adsorbed as a monolayer at 37 K. However, some distortion exists when ethylene is coadsorbed with oxygen atoms. The C2H4 valence-level shifts observed in the presence of K (Cs) are consistent with the electrostatic field existing in the vicinity of the alkali metal adatoms.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(90)90519-E